Wellington School Maths Challenge

On Saturday 26th Me, Dylan, Ethan and William went to Wellington School’s annual Maths Challenge. We only got 8/25 questions correct but you will understand that they were Very hard with a capital “V.” Here is an example: Which of these calculations does not equal 2016?
A 6x12x28 B 7x9x24 C 7x16x18 D 8x12x21 E 8x14x18